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scsi: fnic: Adding debug IO and Abort latency counter to fnic stats

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The IO and Abort latency counter counts the time taken to complete the
IO and abort command into broad buckets. This is not intended for
performance measurement, just a debug statistic.  current_max_io_time
tries to keep track of the maximum time an IO has taken to complete if
it is > 30sec.

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Satish Kharat 2017-02-28 16:15:59 -08:00 committed by Martin K. Petersen
parent 39fcbbc01b
commit 445d296086
4 changed files with 102 additions and 5 deletions
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2
drivers/scsi/fnic/fnic.h
View File

@ -39,7 +39,7 @@
#define DRV_NAME "fnic"
#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
#define DRV_VERSION "1.6.0.21"
#define DRV_VERSION "1.6.0.34"
#define PFX DRV_NAME ": "
#define DFX DRV_NAME "%d: "

43
drivers/scsi/fnic/fnic_scsi.c
View File

@ -823,6 +823,7 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
spinlock_t *io_lock;
u64 cmd_trace;
unsigned long start_time;
unsigned long io_duration_time;
/* Decode the cmpl description to get the io_req id */
fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
@ -1016,6 +1017,28 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
else
atomic64_inc(&fnic_stats->io_stats.io_completions);
io_duration_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
if(io_duration_time <= 10)
atomic64_inc(&fnic_stats->io_stats.io_btw_0_to_10_msec);
else if(io_duration_time <= 100)
atomic64_inc(&fnic_stats->io_stats.io_btw_10_to_100_msec);
else if(io_duration_time <= 500)
atomic64_inc(&fnic_stats->io_stats.io_btw_100_to_500_msec);
else if(io_duration_time <= 5000)
atomic64_inc(&fnic_stats->io_stats.io_btw_500_to_5000_msec);
else if(io_duration_time <= 10000)
atomic64_inc(&fnic_stats->io_stats.io_btw_5000_to_10000_msec);
else if(io_duration_time <= 30000)
atomic64_inc(&fnic_stats->io_stats.io_btw_10000_to_30000_msec);
else {
atomic64_inc(&fnic_stats->io_stats.io_greater_than_30000_msec);
if(io_duration_time > atomic64_read(&fnic_stats->io_stats.current_max_io_time))
atomic64_set(&fnic_stats->io_stats.current_max_io_time, io_duration_time);
}
/* Call SCSI completion function to complete the IO */
if (sc->scsi_done)
sc->scsi_done(sc);
@ -1790,6 +1813,7 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
struct terminate_stats *term_stats;
enum fnic_ioreq_state old_ioreq_state;
int tag;
unsigned long abt_issued_time;
DECLARE_COMPLETION_ONSTACK(tm_done);
/* Wait for rport to unblock */
@ -1843,6 +1867,25 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
spin_unlock_irqrestore(io_lock, flags);
goto wait_pending;
}
abt_issued_time = jiffies_to_msecs(jiffies) - jiffies_to_msecs(io_req->start_time);
if (abt_issued_time <= 6000)
atomic64_inc(&abts_stats->abort_issued_btw_0_to_6_sec);
else if (abt_issued_time > 6000 && abt_issued_time <= 20000)
atomic64_inc(&abts_stats->abort_issued_btw_6_to_20_sec);
else if (abt_issued_time > 20000 && abt_issued_time <= 30000)
atomic64_inc(&abts_stats->abort_issued_btw_20_to_30_sec);
else if (abt_issued_time > 30000 && abt_issued_time <= 40000)
atomic64_inc(&abts_stats->abort_issued_btw_30_to_40_sec);
else if (abt_issued_time > 40000 && abt_issued_time <= 50000)
atomic64_inc(&abts_stats->abort_issued_btw_40_to_50_sec);
else if (abt_issued_time > 50000 && abt_issued_time <= 60000)
atomic64_inc(&abts_stats->abort_issued_btw_50_to_60_sec);
else
atomic64_inc(&abts_stats->abort_issued_greater_than_60_sec);
FNIC_SCSI_DBG(KERN_INFO, fnic->lport->host,
"CBD Opcode: %02x Abort issued time: %lu msec\n", sc->cmnd[0], abt_issued_time);
/*
* Command is still pending, need to abort it
* If the firmware completes the command after this point,

15
drivers/scsi/fnic/fnic_stats.h
View File

@ -26,6 +26,14 @@ struct io_path_stats {
atomic64_t sc_null;
atomic64_t io_not_found;
atomic64_t num_ios;
atomic64_t io_btw_0_to_10_msec;
atomic64_t io_btw_10_to_100_msec;
atomic64_t io_btw_100_to_500_msec;
atomic64_t io_btw_500_to_5000_msec;
atomic64_t io_btw_5000_to_10000_msec;
atomic64_t io_btw_10000_to_30000_msec;
atomic64_t io_greater_than_30000_msec;
atomic64_t current_max_io_time;
};
struct abort_stats {
@ -34,6 +42,13 @@ struct abort_stats {
atomic64_t abort_drv_timeouts;
atomic64_t abort_fw_timeouts;
atomic64_t abort_io_not_found;
atomic64_t abort_issued_btw_0_to_6_sec;
atomic64_t abort_issued_btw_6_to_20_sec;
atomic64_t abort_issued_btw_20_to_30_sec;
atomic64_t abort_issued_btw_30_to_40_sec;
atomic64_t abort_issued_btw_40_to_50_sec;
atomic64_t abort_issued_btw_50_to_60_sec;
atomic64_t abort_issued_greater_than_60_sec;
};
struct terminate_stats {

47
drivers/scsi/fnic/fnic_trace.c
View File

@ -229,7 +229,16 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
"Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n"
"Number of Memory alloc Failures: %lld\n"
"Number of IOREQ Null: %lld\n"
"Number of SCSI cmd pointer Null: %lld\n",
"Number of SCSI cmd pointer Null: %lld\n"
"\nIO completion times: \n"
" < 10 ms : %lld\n"
" 10 ms - 100 ms : %lld\n"
" 100 ms - 500 ms : %lld\n"
" 500 ms - 5 sec: %lld\n"
" 5 sec - 10 sec: %lld\n"
" 10 sec - 30 sec: %lld\n"
" > 30 sec: %lld\n",
(u64)atomic64_read(&stats->io_stats.active_ios),
(u64)atomic64_read(&stats->io_stats.max_active_ios),
(u64)atomic64_read(&stats->io_stats.num_ios),
@ -238,28 +247,58 @@ int fnic_get_stats_data(struct stats_debug_info *debug,
(u64)atomic64_read(&stats->io_stats.io_not_found),
(u64)atomic64_read(&stats->io_stats.alloc_failures),
(u64)atomic64_read(&stats->io_stats.ioreq_null),
(u64)atomic64_read(&stats->io_stats.sc_null));
(u64)atomic64_read(&stats->io_stats.sc_null),
(u64)atomic64_read(&stats->io_stats.io_btw_0_to_10_msec),
(u64)atomic64_read(&stats->io_stats.io_btw_10_to_100_msec),
(u64)atomic64_read(&stats->io_stats.io_btw_100_to_500_msec),
(u64)atomic64_read(&stats->io_stats.io_btw_500_to_5000_msec),
(u64)atomic64_read(&stats->io_stats.io_btw_5000_to_10000_msec),
(u64)atomic64_read(&stats->io_stats.io_btw_10000_to_30000_msec),
(u64)atomic64_read(&stats->io_stats.io_greater_than_30000_msec));
len += snprintf(debug->debug_buffer + len, buf_size - len,
"\nCurrent Max IO time : %lld\n",
(u64)atomic64_read(&stats->io_stats.current_max_io_time));
len += snprintf(debug->debug_buffer + len, buf_size - len,
"\n------------------------------------------\n"
"\t\tAbort Statistics\n"
"------------------------------------------\n");
len += snprintf(debug->debug_buffer + len, buf_size - len,
"Number of Aborts: %lld\n"
"Number of Abort Failures: %lld\n"
"Number of Abort Driver Timeouts: %lld\n"
"Number of Abort FW Timeouts: %lld\n"
"Number of Abort IO NOT Found: %lld\n",
"Number of Abort IO NOT Found: %lld\n"
"Abord issued times: \n"
" < 6 sec : %lld\n"
" 6 sec - 20 sec : %lld\n"
" 20 sec - 30 sec : %lld\n"
" 30 sec - 40 sec : %lld\n"
" 40 sec - 50 sec : %lld\n"
" 50 sec - 60 sec : %lld\n"
" > 60 sec: %lld\n",
(u64)atomic64_read(&stats->abts_stats.aborts),
(u64)atomic64_read(&stats->abts_stats.abort_failures),
(u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts),
(u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts),
(u64)atomic64_read(&stats->abts_stats.abort_io_not_found));
(u64)atomic64_read(&stats->abts_stats.abort_io_not_found),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_0_to_6_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_6_to_20_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_20_to_30_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_30_to_40_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_40_to_50_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_btw_50_to_60_sec),
(u64)atomic64_read(&stats->abts_stats.abort_issued_greater_than_60_sec));
len += snprintf(debug->debug_buffer + len, buf_size - len,
"\n------------------------------------------\n"
"\t\tTerminate Statistics\n"
"------------------------------------------\n");
len += snprintf(debug->debug_buffer + len, buf_size - len,
"Number of Terminates: %lld\n"
"Maximum Terminates: %lld\n"